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How to fix “Invalid IMEI ” after Factory reset

NairaMan Forum / Phones / How to fix “Invalid IMEI ” after Factory reset (1 Post | 467 Views)

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How to fix “Invalid IMEI ” after Factory reset by nairaman(m) : 7:20 pm On May 25

Here's how I solved an invalid IMEI problem for a friend's Infinix X554 immediately after performing a factory reset on the device.

1. Copy Your IMEI
Open your phone's back cover and remove the battery (if battery is removable) and you should see your phone's IMEI numbers. Copy them down on a sheet of paper, repack your phone and power it ON.

Note: If you can't find or don't know your phone's IMEI, then install the Bb IMEI Generator app to generate one for you. If your phone has dual SIM support, you'll need two IMEIs. Note the generated IMEIs by Bb IMEI Generator.

2. Install MTK Engineering Mode
Install the Mobile MTK Engineering Mode app. This will only work on devices with a Mediatek chipset.

This Application allow you to run Advanced Setup from Engineering Mode Menu of MTK phones, also called SERVICE MODE

Other apps which can show the MTK Engineering Mode Menu will probably work too.

3. Open App Settings
In the Mobile MTK Engineering Mode app go to > MTK Settings > Connectivity > CDS Information > Radio Information > Phone 1.

4. Clear The AT+ Line
At the AT+ line:
Remove AT+ completely.

5. Type Your IMEI(s)
You will need to type some command now in that textbox where you deleted AT+. Now, get your IMEI ready.

Then, for the first IMEI, type:

Then tap on 'Send AT Command'.

If you have a dual SIM phone, then, for the second IMEI, type:

Then tap on 'Send AT Command' again.

Note: The quotes are included. There should be a space after AT.

You should get a notification that the AT Command(s) were successfully sent.

6. Restart and Enjoy
Restart your device. You now shouldn't get the 'Invalid IMEI' notification.

Here is a video of another technique that works:

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